In a large bowl, whisk together the flour, powdered sugar, and salt.
Add the cold butter and, using your fingertips or a pastry cutter, quickly cut it into the flour mixture until it resembles coarse crumbs.
Add the egg yolks and sour cream, then knead the dough until it comes together into a smooth ball.
Wrap the dough in plastic wrap and refrigerate for at least 30 minutes.
Preheat your oven to 350°F (180°C). Roll out the dough to about 5 mm thick and line a pie dish with it.
Prick the bottom with a fork, then blind bake (with parchment paper and pie weights) for about 15 minutes. Remove the weights and parchment paper, and bake for another 10 minutes, or until golden brown. Let it cool completely.
Slice the bananas and arrange them evenly on the cooled pie crust.
Mix the peanut butter with the honey, then spread it over the banana layer.
Heat the heavy cream until simmering, then pour it over the finely chopped dark chocolate. Stir until smooth to create a glossy ganache.
Pour the chocolate ganache over the peanut butter layer and spread it evenly with a spatula.
Sprinkle with toasted hazelnuts, then refrigerate for at least 2 hours to allow the filling to set properly.
Slice and serve, and enjoy this delicious banana peanut butter pie!
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